function refuelTurtle()
	if turtle.getFuelLevel() ~= "unlimited" and turtle.getFuelLevel() < 50 then
		local fuelCounter = 0
		for i = 1, 16 do
			if turtle.getItemCount(i) > 0 then
				local data = turtle.getItemDetail(i)
				if data.name == "minecraft:coal" then
					turtle.select(i)
					if turtle.refuel() then
						print("Refueled...")
					else
						print("For some reason I found fuel but I couldn't load it, master...")
					end
				end
			else
				fuelCounter = fuelCounter + 1
			end
		end
		if fuelCounter == 16 then
			print("I'm all out of fuel, master...")
			fuelCounter = 0
		end
	else
		print("Refueling unnecessary...")
	end
end

function checkInventory()
	local emptyInvSlots = 0
	for i = 1, 16 do
		if turtle.getItemCount(i) == 0 then
			emptyInvSlots = emptyInvSlots + 1
		end
	end
	if emptyInvSlots == 0 then
		print("My inventory is full, master...")
	else
		print("Still ", emptyInvSlots, " empty inventory slots remaining...")
	end
end

function move()
	refuelTurtle()
	checkInventory()
	if turtle.forward() then
		print("1..2..1..2..")
	else
		print("I'm stuck, master...")
	end
	findTree()
end

function moveAround()
	turtle.turnRight()
	if turtle.forward() then
		moveRight()
	else
		turtle.turnLeft()
		moveLeft()
	end
end

function moveRight()
	turtle.turnLeft()
	if turtle.forward() then
		if turtle.forward() then
			turtle.turnLeft()
			if turtle.forward() then
				turtle.turnRight()
				print("I moved around the tree.")
				move()
			else
				print("Couldn't go right, trying left...")
				turtle.turnLeft()
				turtle.forward()
				turtle.forward()
				turtle.turnRight()
				turtle.forward()
				turtle.turnRight()
				moveLeft()
			end
		else
			print("Couldn't go right, trying left...")
			turtle.turnLeft()
			turtle.turnLeft()
			turtle.forward()
			turtle.turnRight()
			turtle.forward()
			turtle.turnRight()
			moveLeft()
		end
	else
		print("Couldn't go right, trying left...")
		turtle.turnLeft()
		turtle.forward()
		turtle.turnRight()
		moveLeft()
	end
end

function moveLeft()
	turtle.turnLeft()
	if turtle.forward() then
		turtle.turnRight()
		if turtle.forward() then
			if turtle.forward() then
				turtle.turnRight()
				if turtle.forward() then
					turtle.turnLeft()
					print("I moved around the tree.")
					move()
				else
					print("I'm seriously stuck, master...")
				end
			else
				print("I'm seriously stuck, master...")
			end
		else
			print("I'm seriously stuck, master...")
		end
	else
		print("I'm seriously stuck, master...")
	end
end

function findTree()
	local direction = 0
	local success, data = turtle.inspect()
	if success then
		if data.name == "minecraft:log" then
			cut()
		elseif data.name == "minecraft:fence" then
			if direction == 0 then
				turtle.turnRight()
				if turtle.forward() then
					turtle.turnRight()
					direction = 1
					move()
				else
					print("Couldn't turn right, trying left...")
					turtle.turnLeft()
					turtle.turnLeft()
					if turtle.forward() then
						turtle.turnLeft()
						move()
					else
						print("Couldn't turn left either, so I'm stuck, master...")
					end
				end
			elseif direction == 1 then
				turtle.turnLeft()
				if turtle.forward() then
					turtle.turnLeft()
					direction = 0
					move()
				else
					print("Couldn't turn left, trying right...")
					turtle.turnRight()
					turtle.turnRight()
					if turtle.forward() then
						turtle.turnRight()
						move()
					else
						print("Couldn't turn right either, so I'm stuck, master...")
					end
				end
			else
				print("I've lost my way, master...")
			end
		else
			moveAround()
		end
	else
		move()
	end
end

function cut()
	local movesUp = 0
	while turtle.detect() do
		local success, data = turtle.inspect()
		if data.name == "minecraft:log" then
			turtle.dig()
			turtle.digUp()
			turtle.up()
			movesUp = movesUp + 1
		else
			for i = 1, movesUp do
				turtle.down()
			end
			if turtle.forward() then
				if turtle.forward() then
					turtle.turnLeft()
					turtle.turnLeft()
					placeSapling()
				else
					print("Couldn't move forward, master...")
				end
			else
				print("Couldn't move forward, master...")
			end
		end
	end
end

function placeSapling()
	for i = 1, 16 do
		if turtle.getItemCount(i) > 0 then
			local data = turtle.getItemDetail(i)
			if data.name == "minecraft:sapling" then
				turtle.select(i)
				turtle.place()
				turtle.turnLeft()
				turtle.turnLeft()
				move()
			end
		end
	end
end

move()